On Mon, Jun 11, 2007 at 11:34:26PM +0100, Mikolaj Kucharski wrote: > Hi, > > I've extracted two functions from Pidgin and its SIPE plugin. Both > functions are returning an IP address of an interface (if I understand > correctly). > > I'm attaching C source and output from OpenBSD and Linux. On Linux this > function detects an IP address correctly, but on OpenBSD not. > > Here is part (among others) which I don't understand. Declaration of > struc: > > struct ifreq *ifr; > > and with printf I can see that: > > sizeof(*ifr) == sizeof(struct ifreq) /* 32 bytes */ > > and with my function print_buf I see that on Linux each interface starts > every 32 bytes in a buffer[1024], but on OpenBSD this isn't the case. >
We don't do that, all ifreq follow each other without padding. The size of the objects depends on the size of the passed data in such a evil way that I will not try to explain it here. You don't want to use that interface anyway. > Could someone which knows the subject in question contact with me off > the list, how to fix this issue and shed some light so I could > understand that. Thanks in advance. > > > My other question is, you think that Pidgin should use getifaddrs() to > detect an IP address (please see attached source to avoid confusions)? > YES. getifaddrs is the right way to receive all interface addresses. This is easier to handle. -- :wq Claudio
